D.O. was born Do Kyungsoo 도경수 on Tuesday, January 12, 1993, in Goyang-si, Gyeonggi-do.

He was born in the Chinese Year of the Monkey. Like fellow member Kai, he’s a Capricorn. D.O., Lay, Chanyeol, and Kai’s blood type is A. At a height of 173 cm or 5'8", he’s one of EXO’s shortest members, along with Xiumin, Suho, and Chen. They’re shorter than the tallest member, Chanyeol, by 12 cm.

He attended Baekseok High School. His brother is a year older than he is.

D.O.’s parents were in full support of his professional goals and told him if he had a dream, he should try with all that he had to reach it and make it a reality. Before joining SM, he took vocal lessons. He auditioned and became an SM trainee in 2010.

He shares a room in the dorm with Chanyeol and Kai. According to Sehun, “When you go to his room and open up all his drawers, I guarantee you you’ll find everything neatly piled and organized. He even sorts his shirts by color and by type.”

His role model is composer Yoo Youngjin.

He knows how to beat box and has a habit of humming songs. He likes to cook. He likes fantasy movies. His favorite number is one, and his motto is, “Be number one.”